On April 26,1986, Reactor Number Four at the Chernobyl Nuclear Power Plant exploded and the reactor burned for days afterwards. It was the worst accident in the history of nuclear power, releasing radionuclides over parts of what today are Belarus, Ukraine, and the Russian Federation. On April 28, 2009, the Advanced Land Imager on NASA’s Earth Observing-1 satellite took this true-color picture of the nuclear reactor. Mixing with the network of abandoned buildings, water channels, and roads, areas of green appear—a testament to the vegetation that was growing around the site some 20 years after the accident. Image credit: NASA